jobson



N0. 6l5,|84. Patented Nov. 29, I898;

a. JOBSON. CONVERTIBLE OUIOK OR SLOW COMBUSTION STOVE.

' led v1897-) (Applicahon fi Sept 8, (No Model.) 3 Sheats-Sheet l.

No. 6|5,l84. Patented Nov. 29, I898.

G. JO-BSON. CONVERTIBLE OUIOK 0B SLOW COMBUSTION STOVE.

(Application 810d Sept. 8, 1897.)

(No Model.)

3 Shuts-Shunt 2.

No. 6l5,|84. Patented Nov.'29, I898. G. JOBSON. CONVERTIBLE OUIGK OBSLOW COMBUSTION STOVE.

(Application filed Sapt. 8, 1897.)

3 Shasta-Sheet 3.

[No.Mudel.)

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- for described, partly open.

UNITED STATES PATENT OFFICE.

GEORGE JOBSON, OF HORNOASTLE, ENGLAND, ASSIGNOR OF ONE-HALF TO JAMESBARNS STONE, OF LONDON, ENGLAND.

CONVERTIBLE QUICK OR SLOW COMBUSTION STOVE.

SPECIFICATION forming part of Letters Patent No. 615,184, dated November29, 1898.

Applic i n filed September 8, 1897. Serial No. 650,976. (No model.)

To aZZ whom it may concern:

Be it known that I, GEORGE JOBsON, a subj ect of the Queen ofEngland,residing at Horncastle,in the county of Lincoln, England, haveinvented certain new and useful Improvements in or Relating toConvertible Quick or Slow Combustion Stoves, of which the following is aspecification.

This invention comprises the application to an open domestic fire-grateof revolving doors which inclose the whole fireplace when drawn togetherand which when moved apart recede within or behind the front of thegrate. By the employment of these doors a closed stove is obtainedsusceptible of regulation with reference to its rapidity offuelcombustion. By reason also of the doors revolving to the side of thegrate when not in use instead of folding flatly against the front, thelength occupied in the latter case by the open doors between the pillarsof the fireplace is more usefully applied to the widening of thefire-grate, and thus a greater effective heat-radiating width of thelatter is presented to the room. In addition to this the smartappearance of the stove is still maintained even when the doors are notbrought together, for they neatly disappear, as described above, insteadof folding back on hinges in a manner which would expose their rearfaces.

The top of the stove in my invention consists of a canopy which may bedomed and of ornamental design, and I construct each of the inclosingdoors in one with half of the canopy, and each door, with itshalf-canopy, is pivoted to turn about an axis of rotation which iscentral in the grate.

In the accompanying drawings, Figure 1 is a front elevation of adomestic fire-grate to which improvements according to this inventionare applied, with the shutters, hereinaf- Fig. 2 is a similar view,except that the said doors or shutters are closed. Fig. 3 is a sectionalplan on the line 3 3 of Fig. 4, and Fig. 4 is a transverse verticalsection through the line at 4 of Fig. 2. Fig. 5 is a portion of atransverse vertical section similar to Fig. 4, showing curved base andsill which may be fitted.

Like letters indicate like parts throughout the drawings.

A is a domestic open fire-grate. Revolving doors B are applied thereto,so that the grate may be converted, when desired, into a closed stove.Valves B in the lower part of the doors and A in the upper or canopiedpart of the same are provided to enable the admission of air to thegrate when the doors are brought together to be controlled.

The doors B are preferably semicircular in plan, but maybe flat or ofany other suitable form. They are provided at the top and bottom-withradial arms 13, which are mounted on vertical pivots A or the like andwhich constrain the doors to rotate circularly around these pivots. Inthe form illustrated the half-canopy itself forms the top radial arm. Bythis construction rail-supports for the doors are rendered unnecessary,although, if preferred, that method of hanging the doors may still befollowed, keeping, however, each door, with its half-canopy, in onepiece.

When the stove is to be used as an ordinary open hearth, the revolvingdoors B, turning upon their Vertical pivots, retire through verticalslots A to the rear or side of the stove, where retreats A are providedfor them, thus leaving the entire fore part of the stove unencumberedand freely open to the room.

To procure slower combustion of the fuel in the grate, the doors B B areslid from their retreats, so that they meet together in the center, asin Fig. 2. The supply of air and the draft are now further adj ustableby means of the valves B A, which are of the gridiron type.

Several inches of space intervene between the closed shutters B and thefire-bars A so that the admitted air may have free access to all partsof the fuel.

Preferably a valve A is placed in the canopied portion of each door.

It will be seen that, if desired, a curved fire-base with a sill, suchas A Fig. 5, may be provided, which sill, while having a vertical foreface to make close contact with the revolving doors B, is sosteeplyinclined at its rear face as to act as an internal feeder,throwing back to the grate any cinders, &c., which may fall to the frontof the stove. The outer portion of the base can be flanged at A", ifdesired, to engage with the lower portion of each door and keep it closeup against the ban I claim 1. 111 a grate the combination of a door andcanopyboth moving together and pivoted by radial arms to a pivot centralin the grate.

2. In a grate, the combination with a door and canopy both movingtogether and pivoted by radial arms to a pivot central in the grate, ofa sill having an inclined rear face and flanged piece A to engage thelower portion of the door.

3. In a grate, the combination with a door and canopy moving together,and radial arms GEORGE .TOBSON.

\Vitnesses:

HARRY 13. Bnrnons, A. P. U001).

